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Annotation of src/usr.bin/cmp/special.c, Revision 1.1

1.1     ! deraadt     1: /*      $NetBSD: special.c,v 1.2 1995/09/08 03:23:00 tls Exp $      */
        !             2:
        !             3: /*-
        !             4:  * Copyright (c) 1991, 1993, 1994
        !             5:  *     The Regents of the University of California.  All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  * 3. All advertising materials mentioning features or use of this software
        !            16:  *    must display the following acknowledgement:
        !            17:  *     This product includes software developed by the University of
        !            18:  *     California, Berkeley and its contributors.
        !            19:  * 4. Neither the name of the University nor the names of its contributors
        !            20:  *    may be used to endorse or promote products derived from this software
        !            21:  *    without specific prior written permission.
        !            22:  *
        !            23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            33:  * SUCH DAMAGE.
        !            34:  */
        !            35:
        !            36: #ifndef lint
        !            37: #if 0
        !            38: static char sccsid[] = "@(#)special.c  8.3 (Berkeley) 4/2/94";
        !            39: #else
        !            40: static char rcsid[] = "$NetBSD: special.c,v 1.2 1995/09/08 03:23:00 tls Exp $";
        !            41: #endif
        !            42: #endif /* not lint */
        !            43:
        !            44: #include <sys/types.h>
        !            45:
        !            46: #include <err.h>
        !            47: #include <stdlib.h>
        !            48: #include <stdio.h>
        !            49: #include <string.h>
        !            50:
        !            51: #include "extern.h"
        !            52:
        !            53: void
        !            54: c_special(fd1, file1, skip1, fd2, file2, skip2)
        !            55:        int fd1, fd2;
        !            56:        char *file1, *file2;
        !            57:        off_t skip1, skip2;
        !            58: {
        !            59:        int ch1, ch2;
        !            60:        off_t byte, line;
        !            61:        FILE *fp1, *fp2;
        !            62:        int dfound;
        !            63:
        !            64:        if ((fp1 = fdopen(fd1, "r")) == NULL)
        !            65:                err(ERR_EXIT, "%s", file1);
        !            66:        if ((fp2 = fdopen(fd2, "r")) == NULL)
        !            67:                err(ERR_EXIT, "%s", file2);
        !            68:
        !            69:        while (skip1--)
        !            70:                if (getc(fp1) == EOF)
        !            71:                        goto eof;
        !            72:        while (skip2--)
        !            73:                if (getc(fp2) == EOF)
        !            74:                        goto eof;
        !            75:
        !            76:        dfound = 0;
        !            77:        for (byte = line = 1;; ++byte) {
        !            78:                ch1 = getc(fp1);
        !            79:                ch2 = getc(fp2);
        !            80:                if (ch1 == EOF || ch2 == EOF)
        !            81:                        break;
        !            82:                if (ch1 != ch2)
        !            83:                        if (lflag) {
        !            84:                                dfound = 1;
        !            85:                                (void)printf("%6qd %3o %3o\n", byte, ch1, ch2);
        !            86:                        } else
        !            87:                                diffmsg(file1, file2, byte, line);
        !            88:                                /* NOTREACHED */
        !            89:                if (ch1 == '\n')
        !            90:                        ++line;
        !            91:        }
        !            92:
        !            93: eof:   if (ferror(fp1))
        !            94:                err(ERR_EXIT, "%s", file1);
        !            95:        if (ferror(fp2))
        !            96:                err(ERR_EXIT, "%s", file2);
        !            97:        if (feof(fp1)) {
        !            98:                if (!feof(fp2))
        !            99:                        eofmsg(file1);
        !           100:        } else
        !           101:                if (feof(fp2))
        !           102:                        eofmsg(file2);
        !           103:        if (dfound)
        !           104:                exit(DIFF_EXIT);
        !           105: }